BUG: FrozenList is hashable when docs claim it is not

[pyrito]

Pandas version checks

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Reproducible Example

from pandas.core.indexes.frozen import FrozenList
l = FrozenList([1,2,3])
hash(l) # This works, when docs say that it should be non-hashable

Issue Description

Currently the internal docs (pandas/core/indexes/frozen.py:21) for FrozenList claim that it is non-hashable, however it seems like this is not the case?

Expected Behavior

According to the docs, FrozenList should not be hashable. Or if the internal docs are wrong, this should be changed.

Installed Versions

INSTALLED VERSIONS

commit : e8093ba
python : 3.9.12.final.0
python-bits : 64
OS : Darwin
OS-release : 21.3.0
Version : Darwin Kernel Version 21.3.0: Wed Jan 5 21:37:58 PST 2022; root:xnu-8019.80.24~20/RELEASE_ARM64_T6000
machine : x86_64
processor : i386
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 1.4.3
numpy : 1.22.4
pytz : 2022.1
dateutil : 2.8.2
setuptools : 61.2.0
pip : 22.1.2
Cython : None
pytest : 7.1.2
hypothesis : None
sphinx : 5.0.1
blosc : None
feather : 0.4.1
xlsxwriter : None
lxml.etree : 4.9.0
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : 8.4.0
pandas_datareader: None
bs4 : 4.11.1
bottleneck : None
brotli :
fastparquet : None
fsspec : 2022.5.0
gcsfs : None
markupsafe : 2.1.1
matplotlib : 3.5.2
numba : None
numexpr : 2.8.1
odfpy : None
openpyxl : 3.0.10
pandas_gbq : 0.17.6
pyarrow : 8.0.0
pyreadstat : None
pyxlsb : None
s3fs : 2022.5.0
scipy : 1.8.1
snappy : None
sqlalchemy : 1.4.37
tables : 3.7.0
tabulate : None
xarray : 2022.3.0
xlrd : 2.0.1
xlwt : None
zstandard : None

[twoertwein]

FrozenList is hashable, I recently fixed the type annotations for it in #47654.

Feel free to open a PR adjusting the doc-string.

I think FrozenList is not intended to be public (like most classes that are not explicitly re-exported in __init__.py or api.py).

[pyrito]

Awesome, thanks @twoertwein . I'll make a doc change for this.